Carrying scraper



June 24, 1947. J. 5. WALCH CARRYING SCRAPER Filed lay 9, 1941 4 Sheets-Sheet 1 mvzm'on Jacob 5. Male ATTO R N 2Y5 June 24, 1947. WALCH 2,422,813

CARRYING SCRAPER Filed May 9, 1941 4 Sheets-Sheet 2 mvsmoa Jacob 5. Walsh M MM ATTO RH 8Y5 June 24, 1947.

J. S. WALCH CARRYING SCRAPER Filed May 9,1941

4 Sheets-Sheet 3 mvzmon JacobS. Wslch ATTORNEYS June 24, 1947- J.s. WALCH CARRYING SCRAPER Filed llay 9, 1941 4 Sheets-Sheet 4 INVENTOR Jacob S. We l h a Q R. W 9v N mwmw Patented June 24, 1 947 UNITED STATES PATENT OFFICE 2,422,813 CARRYING SCRAPER Jacob S. Walch, Stockton, Calif.

Application May 9, 1941, Serial No. 392,712

27 Claims. 1

This invention relates to carrying scrapers, and is a continuation in part of my application, Serial No. 304,541, filed November 15, 1939, and abandoned on June 30, 1941. My main objects are to provide a scraper of this general type which is a self-contained and self-propelled unit with the power applied to all the supporting wheels, so that adequate tractive power for all leading conditions is obtained; and one which can travel forward or backward with equal facility and speed so that it is unnecessary to make sharp turns before or after loading or discharging a load, so that the scraper may work in narrow and confined spaces.

Further objects are to provide a scraper having self-contained means for moving the bowl to and from its various positions and for causing a positive discharge of the load when desired, and a scraper which is extremely easy to load and discharge, and which when fully loaded and the bowl is closed and lifted to a transporting or loading position, leaves no spoils heap behind.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purpose for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings similar characters of reference indicate corresponding parts in the several views:

Figure 1 is a side elevation of the scraper in loading position.

Figure 2 is a similar view, partly in section, showing the scraper in carrying position.

Figure 3 is a plan view of the scraper in the same position.

Figure 4 is a fragmentary sectional elevation of the scraper in a fully discharged position.

Figure 5 is a fragmentary enlarged cross-section on line 5--5 of Fig. 1.

Figure 6 is a fragmentary longitudinal view showing a load bearing roller between the telescoped main frame beams of the main and auxiliary bowls.

Referring now more particularly to the characters of reference on the drawings, what may be considered as the main frame of the scraper comprises a pair of tubular open-ended side beams I connected at the front end and at a point short of the rear end by cross members 2.

The beams I support the main or back bowl of the scraper which comprises side plates 3 dely a certain distance from the rear cross member 2, a bottom plate 4 supported by the side plates at their lower end and disposed parallel to the beams and a scraping blade 5 sloping down from the forward end of the bottom plate.

The scraper is supported at its rear end, behind the bowl, by a pony truck 6 having transversely spaced dual-tire wheels 1.

Rigid with and upstanding from the truck between the wheels is a hydraulic cylinder-8 in which a piston 9 is both slidable and turnable. Asleeve including vertically spaced members In is slldable and turnable on the cylinder, and is connected as a rigid unit with the piston above the cylinder by a yoke II. The sleeve in turn is rigidly connected to the main bowl of the scraper by a radial arm member l2 extending forwardly from the sleeve and secured against a cross plate l3 mounted in connection with the side plates 3 at their rear end.

A collar 14 slidably but non-rotatably engages the cylinder 8 between the sleeve members In, this collar being rigid with an arm unit l5 which is connected to the outer end of the piston rod it of a transversely disposed hydraulic cylinder ll mounted on the arm 12 as plainly shown in Fig. 3.

It will therefore be seen that by admitting or withdrawing fluid from the cylinder below piston 9, the sleeve and consequently the main bowl will be raised or lowered at its rear end. It will also be seen that by admitting fluid to one end or the other of the cylinder 11, the collar I4 and cylinder, which forms a kin pin, will be turned about the sleeve as an axis, and since the cylinder is rigid with the truck, the latter will be steered.

The truck wheels are driven from a gas engine It mounted on the truck behind the cylinder 8. In order to dispose the engine and its drive connections in symmetrical relation to the wheels, the engine is preferably formed as two spaced units arranged in tandem, as shown in Fig. 3, with the main crank-shaft mounted drive gear l5 between the units, as shown in Fig. 2. The engine is set suiliciently above the wheel axle to allow for the location of the necessary transmission gear housing 20 being disposed below the engine and mainly above the wheel axle as shown.

This housing contains a suitable clutch (not shown) whereby the engine'drives suitable transmission gearing which may include, for example, gears i9 and 20a (illustrated diagrammatically),

pending from the beams and extending forward- 55 which connects with the main differential gear D onthe axle unit.A.. of the adjacent wheels so that said wheels may be driven inopposite" di-' rections as operations may require. 'I l'i'econtrol levers L for shifting the. gearsof the transmission extend upwardly in front of theens efor' P- eration in a manner which will be seen later.

Slidable in the beams I are the tubular frame beams 2! of the auxiliary-or front bowl.

I, a vertical back plate. 24 connecting the side plates at their rear end, an upwardly curving at a level intermediate the top andbottom edges of the blade 6. The beams 2| are directly connected together only at their forward end, ahead of beams I, by a, cross beam 21. 1

plates 3. at their forward end; the rods having heads 35 on their rear end incapable of passing through the guides.

The parts of the front bowl are so proportioned and related to the main bowl that when the bowls are fully contracted, the blade '26 and 5 are in contact, the back plate 24 is then adjacent the rear end of the bowl and the end gate at is in v its forward position. When the bowls are fully extended relative to each other, the end plate 24 .is disposed adjacent the rear end of blade 5, while the end gate 28 occupies a position at the forward end of blade 26 as shown in Fig. 4. The end gate assumes this position by reason of the fact that the length of rods 33 between the heads 35 and shaft 3| is less than the full extending movement of the bowls and consequently the.

heads bring up against the guides 34 before the bowls are fully extended, and further'extending movement relatively swings the end gate rearwardly.

Relative extending and contracting movement of the bowls is imparted thereby by hydraulic cylinders 38 mounted on the side plates 3- and having piston rods 3'! connected to side plates 22 ahead of side plates 3. The cylinders extend parallel to the supporting beams, so that adirect push and pull movement is imparted to the bowls without any swivel connections being necessary.

The front bowl is supported by a steerable pony truck 38 vertically adjustable relative to said bowl and identical with the rear truck and whose wheels 39 are likewise driven by a gas engine and power plant unit 40 mounted on the truck 38, and which is a duplicate of that shown and described in connection with engine 18.

Instead of the sleeve l0a which surrounds the kingpin cylinder to being rigid with the front bowl, however, it is rigid only with horizohtal sleeve 4| which turns on a fixed spindle 42 projecting from and rigid with the front bowl at its forward end; the sleeve and spindle being tied together against relative axial. movement by a bolt 43. In this manner, it willbe seen t at the This comprises side plates 22- secured on the beams 2!" just inwardly of plates 3 and dependingfrom the I 7 beams through longitudinal slots 23 in the beams.

\ may spill over the rear end of the bowl:

In operation, to scrapea load, the bowls The front bowl is provided with an end gate 28 depending in swinging relationfrom a cross front truck, be si'des being steerable independently Z'iof the rear truck,m'ay swivel in a vertlcal trans-' verse planejrelative thereto, as uneven ground contour may require.

5 In'order to reduce friction between the 00;,

operating telescoping beams I, and 2|, a, roller 44 is mounted on 'top'ofthe forward end of eachbeam l to overhang the same and ride on the adjacent surface of beam 2|.

10' 1 At the rearend, each beanll has a rearwardly,

projecting bracket 45 secured therein, which supports a roller 46 riding. on the inside of-the beam ner, the frictional pressure on the beams, which 5 is'greatest at opposed points, is taken by the U friction reducing rollers. The rear rollers 45 are always concealed within thebeams I, so that they are protected from contact with any dirt which are relatively separated somewhat and are'lowered until the blade 5 has attained a desired digging depth as shown in' Fig. 1. The vertical adjustments of the opposite ends of the scraper'being 5 capable of being controlled independently, it is possible to dispose the rear bowl, in which the dirt is initially received, at a-very flat angle to the ground, so that an easy flow of dirt into the bowl is facilitated.

When the bowl is loaded, the bowls are brought together, the blade of the front bowl then biting through thedirt in front of the rear bowl and the front bowl, then making a complete closure with the rear bowl, thus positively gathering up and retaining practically all the dirt dug up by the blade 5.

- The bowls are then elevated by admission of fluid into cylinders 8 and 8a, and the scraper may be transported to the desired point for dumping,

traveling ineither direction without first turning if desired and as the topography of the area being I worked may render most feasible.

Upon arriving at the point for discharge of-the load, the latter may be gradually dischargedwith an accompanying leveling operation, or as a full load in one spot, depending on the elevation of the bowls and the forward movement thereof. such separation or relative extension of the bowls,

the rear plate 24 of the forward bowl, and which b is in eifect'the forwardly movable end gate of the fearbowl, positively sweeps all dirt out from'the latter, and as the bowls approach a fully extended position, the end gate 28 likewise moves rearwardly, sweeping all dirt from the front bowl.

It will benoted that with any such extending or contracting movement of the bowls, one wheel truck or the other must move along the ground. Such.movement, if both 'sets'of wheels are free to rotate, will be determined by the relative resistance offered to such rotation, and which will usually depend on ground conditions. If it isdesired, however, thatone bowl or the other'shall' I remain stationary with any contracting or extending movement of the bowls, the wheels of the truckpf said onebowl may be locked to the'corresponding engine, or otherwise braked, to prevent rotation of the wheels. I

The control levers L of both power plants are adapted for manipulation by separate operators in the following manner:

Mounted on and projecting upwardly from the cross beam 2 nearest engine I 8 and from cross beam 21 are short posts 41 which support swivel platforms 48 each having a seat thereon'spaced radially from the post, so that the seat may be With l at the bottom, asshown in Fig. 6. In thismanthe direction of movement of the scraper.

Levers 50, corresponding to levers L, are pivoted on and upstand from each post on opposite sides, and are connected to said levers L by flexible push-and-pull units 5| extending from below the platform and arranged so as to be capable of functioning irrespective of the position of the corresponding wheel truck and power plant unit relative to the post.

The necessary control valves 52 for the various hydraulic units are also supported from the posts so as to be convenient for operation by the occupant of the seat regardless of which way the latter is facing. Thevalves to control the steering of truck 38 and the elevation of the auxiliary bowl are mounted on the adjacent post, while the valves to control the steering of truck 6 and the elevation of the main bowl, as well as the valve to control the fluid in cylinders 36, are mounted on the other post.

It will thus be seen that the operators are stationed where visibility of operations is unrestricted, and that they comfortably face in the direction of travel of the scraper, with the control levers and valves in equally convenient locations in either case.

From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the objects of the invention as set forth herein.

While this specification sets forth in detail the I present and preferred construction of the device,

in supporting and relatively vertically adjust-' able relation, the means for each truck comprising an upstanding member rigid with the truck, a sleeve slidable'on the member, and means between the sleeve and member to control the sliding movement; means rigidly connecting the sleeve of one truck and the adjacent end of the bowl unit, a member rigid with and projecting radially from the sleeve of the other truck .toward the corresponding end of the bowl unit, and a member rigid with and projecting from said end of the bowl unit and cooperating with the first named member in supporting and relatively turnable relationship.

2. A scraper comprising a wheel supported rear bowl, a separate wheel supported front bowl, the bowls being disposed in facing relation, means mounting the bowls as a unit for relative sliding movement in a horizontal plane and in opposite directions, and means between the bowls to control such relative movement.

3. A scraper comprising a rear bowl having a ing relation to the rear bowl, means mounting the bowls together as a unit for relativehorizontal movement and so that the front bowl may be disposed in closing. relationship with the rear bowl or be separated therefrom a predetermined 5. A scraper comprising a rear bowl having a bottom plate provided with a scraping blade at its forward end, a front bowl disposed in facing relation to the rear bowl, means mounting the bottom plate provided with a scraping blade at bowls together as a unit for relative horizontal movement and so that the front bowl may be disposed in closing relationship with the rear bowl or be separated therefrom a predetermined distance to provide a gap between the bowls for loading and discharge, a movable front endgate mounted in the front bowl and normally disposed at the forward end of said bowl, and means between said gate and the rear bowl to move the gate to the rear end of the front bowl with the relative separation of the bowls to their limit of movement.

6. A scraper comprising a rear bowl, a front bowl. tubular side beams rigid with the rear bowl at the top thereof, side beams rigid with the front bowl and slidably projecting into the tubular beams whereby the bowls may move lengthwise of each other, and means between the bowls to control the relative movement of the bowls.

7. A scraper comprising a rear bowl, a front bowl, tubular side beams rigid with the rear bowl at the'top thereof, side beams rigid with the front bowl and slidably projecting into the tubular beams from their forward end and terminating within said tubular beams, a roller mounted on each tubular beam at the top and front end thereof and engaging the adjacent surface of the corresponding beam, and a roller mounted on the rear end of said cooperating beam at the bottom and engaging the adjacent inner surface of the tubular beam.

8. A scraper comprising separate front and rear bowls, the forward end of the front bowl being permanently ahead of the forward end of the rear bowl, longitudinal side beams rigid with the front bowl, side beams rigid with the rear bowl and slidably engaging the first named beams whereby the bowls may move lengthwise of each other and means to control the relative movement of the bowls.

9. In a scraper having a bowl unit and wheel trucks supporting the unit at its ends; an upstanding cylindrical member rigid with one truck, a sleeve on the unit in which said member is both slidable and turnable, means to control the relative sliding movement of the sleeve and member, said sleeve having a vertical gap intermediate its ends exposing the adjacent portion of the member, a collar slidably but nonturnably engaging the member and disposed in said gap and means applied to the collar to rotate the same relative to the sleeve.

10. In a scraper having a bowl unit and wheel truck supporting the unit at its ends; an upstanding cylindrical member rigid with one truck, a sleeve on the unit inwhich said member is both slidable and turnable, said member be.

ing in the form f a hydraulic cylinder and a piston fixed with the sleeve and projecting into the cylinder from its upper end whereby admission of hydraulic fluid into the cylinder below the piston will impart vertical movement to the piston and sleeve. I

- 11. A scraper comprising front and rear bowls disposed in facing relation, means mounting the front bowl in connection with the rear bowl for movement ina horizontal plane relative thereto, a gate pivoted at its upper end in the front bowl for rearward swinging movement to a clean-out position, an element rigid with the gate below its pivot and projecting through an arcuate slot in the side of the front bowl, a rod mounted on and projecting rearwardly from the element, a guide for the rod mounted in fixed connection with the rear bowl and a stop onthe rod rearwardly of the guide to engage the same only after a predetermined separating movement of the bowls has taken place.

determined separating movement of the bowls has taken place.

18. In a vehicle, a wheeled truck, a cylindrical tubular member upstanding from the truck,

. said member being closed at its lower end, a vehicle frame, a sleeve on the frame slidably and turnably engaging about the member, a piston slidable and turnable in the member and extending above the same, a yoke connecting the sleeve and the piston at the top, and a fluid pressure conduit connected to the member below the sleeve and communicating with the space between the piston and closed end of said member, and separate means to turn the member relative to the sleeve.

19. In a vehicle,.a wheeled truck, a hydraulic cylinder on and upstanding from the truck, said cylinder being closed at its lower end, a vehicle a frame, a sleeve on" the frame slidably engaging 12. A scraper comprising separate front and rear bowls, the forward end of the front bowl being permanently ahead of the forward end of the rear bowl, wheels supporting the scraper and means mounting the front bowl in connccg tion with the rear bowl for movement .in a hori-f zontal plane and in its entirety relative to the rear bowl. V 13. A scraper comprising a rear bowl and wheels supporting the same and mounted theretruck, a sleeve onthe .frame slidably and turnabout the cylinden a piston slidable in the cylinder and projecting, above the same, a yoke connecting the sleeve and the piston at its upper end, and a conduit connected to the cylinder below the piston. 4 v) 20. In a vehicle, a vehicle frame, a wheeled truck; a, cylindrical nember upstanding from the ably engaging about the member, means to conwith as a unit; a front bowl and wheels supporting the same and mounted therewith as a unit,

the units being separate and capable of independent horizontal movement, and means mounting the units together to allow of rel ative horizontal movement thereof.

14. A structure as in claim 13, with separate power plants applied to the wheels of the two units whereby the units may be moved along the ground together or one-unit may be heid stationary while the other one is moved. i

15. In a scraper having a bowl unit and wheel trucks beyond the unit at its opposite ends; an;

' upstanding member rigid with each truck, a

sleeve rigid with the corresponding end of the bowl unit and slidable on the member, means v 'between the sleeve and member to control the slidingmovement; the member of one truck being cylindrical and the corresponding sleeve being turnable thereon and means between the 'me'mberand sleeve to control relative turning thereof.

16. A scraper comprising front and rear bowls disposed in facing relation,'means mounting the bowls together for relative movement in a hori zontal plane, a gate mounted in one bowl for movement to a clean-out position from a normal retracted position, and means between the gate and the other bowl to cause the gate to be moved to the clean-out position only after a predetermined separating movement of the bowls has taken place.

1'7. A scraper comprising front and rear bowls disposed in facing relation, means mounting the bowls together for relative movement in a horizontal plane, a gate mounted in one bowl for movement to a clean-out position from a normal retracted position, an element rigid with the gate and projecting through a slot in said one bowl, a rod connected to said element outside .the one bowl and extending lengthwise of the bowls and overlapping the other bowl, a guide for 'the rod mounted on said other bowl and a stop .made up of front and rear body sections, each comprising a, scraper, means for propelling said vehicle, and instrumentalities for causing relative bodily movement of the body sections toward and fromone another.

v 22. A dirt "scraping and hauling vehicle as claimed in claim 21, comprising suitable wheels for supporting th vehi le, and means for raising and lowering the body sections relatively to such wheels.

A 23. In a dirt scraping and hauling vehicle, in

"combination, asupporting frame comprising relatively slidable front and rear frame means,

- supporting wheels for the vehicle connected to said frame, a dirt receiving body mounted on 'the frame .and comprising a rear section and a front section, instrumentalities for causing relative sliding movement of the frame members longitudinally of the vehicle to impart corresponding relative movement to the body sections, and means for elevating and lowering the said frame members and body sections.

24. In a vehicle of the class described, in combination, a vehicle body comprising front and rear sections, means connecting said sections together for movement toward and away from each other to move the same back and forth between open and closed positions, each of said sections being provided with a scraper blade, and elevating means at each end of said body independently operable at different times to cause movement of said scraper blades into position to perform a scraping. action.

25. In a vehicle of the class described, in combination, a, vehicle body comprising front and rear sections, means telescopically connecting said 9 operable elevating means at the front and rear ends of said body. the scraper blade on said rear section being operable to perform a scraping action when said body is in an open position and upon operation of one of said elevating; means to move the same into engagement with the a ground, the scraper blade on said front section being operable to perform a scraping action upon operation of said other elevating means to lower the same into engagement with the ground and upon movement of said front section toward said rear section into closed position.

26. In a vehicle of the class described, in combination, a vehicle frame comprising front and rear sections slidably connected together for movement toward and away from each other. a scraper body having a dirt carrying part mounted on one of said sections and a closure part on the other of said sections, a scraper blade mounted on each of said parts, separate elevating means supporting each end of said frame, means for operating one of said elevating means tolower the scraper on said dirt carrying part into engagement with the ground for eflfecting a scraping action on movement of said vehicle, and means for operating the other of said elevating means to lower the scraper on said closure part into engagement with the ground, said last mentioned scraper being operated to effect a scraping action upon movement of said sections towards each other to move said closure part to closed position while said vehicle is at rest.

i0 27. A scraper comprising front and rear bowls disposed in facing relation, means mounting the bowls together for relative movement in a horizontal plane, a swinging sate mounted in one bowl for movement to a clean-out position from a normal retracted position, an element rigid with the gate and projecting through an armate slot in said one bowl, a rod connected to said element outside the one bowl and extending lengthwise of the bowls and overlapping the other bowl, 1:. guide for the rod mounted on said other bowl and a stop on the rod to engage the guide only after a predetermined separating movement of the bowls has taken place.

JACOB S. WALCH.

REFERENCES crrEn The following references are of record in the file of this patent: 

